A power-generation test for oxide-based thermoelectric modules using p-type Ca 3Co 4O 9 and n-type Ca 0.9Nd 0.1MnO 3 legs

Chang Hyun Lim, Soon Mok Choi, Won Seon Seo, Hyung-Ho Park

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Metal oxides are considered to be promising thermoelectric (TE) materials, especially for high-temperature power-generation applications, because they have many advantages such as low price, light weight, thermal stability, nontoxicity, and high oxidation resistance. For these reasons, oxide-based TE modules were fabricated using p-type pure Ca 3Co 4O 9 and n-type Ca 0.9Nd 0.1MnO 3 legs for power generation at temperatures in excess of 1000 K. This study involved the use of Ag sheets with a Ag paste as electrode materials and alumina plates as a substrate for the modules. The p-type pure Ca 3Co 4O 9 legs were manufactured by spark plasma sintering, and the n-type Ca 0.9Nd 0.1MnO 3 legs were sintered by a conventional process at atmospheric pressure. From a unicouple, a power density as high as 93.2 mW/cm 2 under a temperature condition of ΔT = 727 K (T hot = 1175 K) was obtained. This high power density is believed to be a result of the modified contact of the electrode (notch process) and the optimized material properties (the SPS process and a dopant effect) along with the high ΔT obtained in this study (reduced thermal losses because of good packing of thermal insulation). Areas of concern for future research include the following: (1) the measured open-circuit voltage from the present unicouples was only 94.3% of the theoretical voltage, and (2) the internal resistance value was as high as 490% of the theoretical resistance.

Original languageEnglish
Pages (from-to)1247-1255
Number of pages9
JournalJournal of Electronic Materials
Volume41
Issue number6
DOIs
Publication statusPublished - 2012 Jun 1

Fingerprint

Oxides
Power generation
radiant flux density
modules
thermal insulation
thermoelectric materials
oxides
oxidation resistance
notches
electrode materials
sparks
open circuit voltage
metal oxides
atmospheric pressure
sintering
Electrodes
thermal stability
Spark plasma sintering
aluminum oxides
Aluminum Oxide

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

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title = "A power-generation test for oxide-based thermoelectric modules using p-type Ca 3Co 4O 9 and n-type Ca 0.9Nd 0.1MnO 3 legs",
abstract = "Metal oxides are considered to be promising thermoelectric (TE) materials, especially for high-temperature power-generation applications, because they have many advantages such as low price, light weight, thermal stability, nontoxicity, and high oxidation resistance. For these reasons, oxide-based TE modules were fabricated using p-type pure Ca 3Co 4O 9 and n-type Ca 0.9Nd 0.1MnO 3 legs for power generation at temperatures in excess of 1000 K. This study involved the use of Ag sheets with a Ag paste as electrode materials and alumina plates as a substrate for the modules. The p-type pure Ca 3Co 4O 9 legs were manufactured by spark plasma sintering, and the n-type Ca 0.9Nd 0.1MnO 3 legs were sintered by a conventional process at atmospheric pressure. From a unicouple, a power density as high as 93.2 mW/cm 2 under a temperature condition of ΔT = 727 K (T hot = 1175 K) was obtained. This high power density is believed to be a result of the modified contact of the electrode (notch process) and the optimized material properties (the SPS process and a dopant effect) along with the high ΔT obtained in this study (reduced thermal losses because of good packing of thermal insulation). Areas of concern for future research include the following: (1) the measured open-circuit voltage from the present unicouples was only 94.3{\%} of the theoretical voltage, and (2) the internal resistance value was as high as 490{\%} of the theoretical resistance.",
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A power-generation test for oxide-based thermoelectric modules using p-type Ca 3Co 4O 9 and n-type Ca 0.9Nd 0.1MnO 3 legs. / Lim, Chang Hyun; Choi, Soon Mok; Seo, Won Seon; Park, Hyung-Ho.

In: Journal of Electronic Materials, Vol. 41, No. 6, 01.06.2012, p. 1247-1255.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A power-generation test for oxide-based thermoelectric modules using p-type Ca 3Co 4O 9 and n-type Ca 0.9Nd 0.1MnO 3 legs

AU - Lim, Chang Hyun

AU - Choi, Soon Mok

AU - Seo, Won Seon

AU - Park, Hyung-Ho

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AB - Metal oxides are considered to be promising thermoelectric (TE) materials, especially for high-temperature power-generation applications, because they have many advantages such as low price, light weight, thermal stability, nontoxicity, and high oxidation resistance. For these reasons, oxide-based TE modules were fabricated using p-type pure Ca 3Co 4O 9 and n-type Ca 0.9Nd 0.1MnO 3 legs for power generation at temperatures in excess of 1000 K. This study involved the use of Ag sheets with a Ag paste as electrode materials and alumina plates as a substrate for the modules. The p-type pure Ca 3Co 4O 9 legs were manufactured by spark plasma sintering, and the n-type Ca 0.9Nd 0.1MnO 3 legs were sintered by a conventional process at atmospheric pressure. From a unicouple, a power density as high as 93.2 mW/cm 2 under a temperature condition of ΔT = 727 K (T hot = 1175 K) was obtained. This high power density is believed to be a result of the modified contact of the electrode (notch process) and the optimized material properties (the SPS process and a dopant effect) along with the high ΔT obtained in this study (reduced thermal losses because of good packing of thermal insulation). Areas of concern for future research include the following: (1) the measured open-circuit voltage from the present unicouples was only 94.3% of the theoretical voltage, and (2) the internal resistance value was as high as 490% of the theoretical resistance.

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